A corpora



J DITSON.

DRILL STEEL PLNNING DEVICE.

APPLICATION FILED JUNE 30, I917.

Patented June 10, 1.919.

5 SHEETS-SHEET 1.

INVENTOH A TTOR/VEY no. NoRms PEYEIRS C0.PNO7w-Lu .vAsnlNGTON. u c.

J. DITSON.

DRILL STEEL PINNING DEVICE.

APPLICATION FILED 1UNE30. mm.

Patented June 10, 1919.

5 SHEETSSHEET 2.

In: NORRIS Psrsres ca. rum-04.1mm. WASHINGmN. n c.

J. DlTSON.

DRILL STEEL PINNING DEVICE.

APPLICATION FILED JUNE 30. 1911.

. 1 ,306, 1 O6, Patented June 1.0, 1919.

5 SHEETSSHEET 3.

IN VE/V 70/? AZZW A77 H/VEY 1. nnsom. DRILL STEEL PINNING DEVICE.

APPLICATION FILED JUNE 30,1917.

Patented June 10, 1919.

' 5 SHEETS-SHEET 4.

I/Vl/E/V TOR ATT RNEY 1 NORRIS Perms co.. Punw 4.11pm., WASHINGTON. n,c.

1. nnsoN. DRILL STEEL PINNING DEVICE.

APPLICATION FILED JUNE 30,19I7.

5 SHEETS-SHEET 5.

Patented June 10, 1919.

11 T ORA/EV ms mmms PETERS 50.. PN07U-LfrH( wnsmnarou. n. c.

JESSE DITSON, 0F LITTLETON, COLORADO, ASSIGNOR TO THE J. GEO. LEYNERENGINEERING WORKS COMPANY, OF LITTLETON, COLORADO, A CORPORA- TION OFCOLORADO.

DBILL-STEEL-PINNING DEVICE.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, JEssn DI'rsoN, a citizen of the United States,residing at Littleton, in the county of Arapahoe and State of Colorado,have invented a certain new and useful Improvement inDrill-Steel-Pinning Devices, of which the following is a specification.

The present invention relates to pinning out devices for rock drills andmore in particular to one operated entirely by fluid pressure.

In the present day mining drills, it is usual to provide the drill steeland cutting bit with a central hole extending throughout its length forthe purpose of supplying air under pressure, and water to the cuttingedges of the tool to force the cuttings away from the cutting edges ofthe tool and also to prevent overheating and the formation of dust. Inresharpening a drill bit having a central hole of the type abovementioned it is important that this hole is not allowed to become closedor clogged in any way. For this reason it has been difficult tore-sharpen a drill successfully and rapidly for the reason that theforming or sharpening dolly forces metal into the hole at eachreciprocation and in order to clear the hole it has been the practice toforce a pin into the hole after the bit has been sharpened by means of aheavy hammer and then forcing the pin out of the hole by means of acrude clamp and puller mounted adjacent to or forming a part of thesharpener.

The present invention comprises a machine which by means of fluidpressure holds a drill rod in position to be operated upon by a pinreciprocated forwardly and backwardly by means of a supply of fluidunder ressure for the purpose of cleaning the hole after the drill hasbeen re-sharpened. The holding or clamping means for the drill rod areso mounted that the drill rod is held in alinement with and adjacent tothe fluid operated pinning out devise.

The objects of my invention are to improve the pinning out devices atpresent used; to operate them entirely by means of fluid pressure; andto facilitate and expedite the pinning out of newly sharpened orre-sharpened rock drills.

With these and other objects in view my invention consists in thefeatures of construction and operation set forth in the followingspecification.

In the drawings annexed hereto and forming a part hereof,

Figure 1 shows a front view of the complete machine made in accordancewith the present invention;

Fig. 2, a side view of the upper portion of the machine partly insection;

Fig. 3, another side View of the upper portion of the machine viewedfrom the opposite side to Fig. 2;

Fig. 4-, a front view of portions of the invention, parts being shown insection;

Fig. 5, a rear View of portions of the machine;

Fig. 6, a section on the line 5-5 of Fig. 2;

Fig. 7, a section on the line 77 of Fig. 6.

Referring more particularly to the drawings, 1 represents the base uponwhichthe working members of the machine are mounted. This obviously maybe of any convenient form. The base 1 is flanged at its upper edge 2 towhich a casting forming the body member of the machine 3 flanged at itslower edge or surface 1, is fastened by means of stud bolts 5. The bodymember 3 I,

Patented June 10, 1919.

is formed on one side with alarge cylinder 6 g I in which a piston 7reciprocates. The piston 7 carries a pin 8 which extends forwardly fromthe piston 7 and passes out from the cylinder 6 through a stuffing box9. Extending rearwardly from the piston 7 is an eX-' tension arm or rod10 having a hole 11 bored therethrough and abutting the end of pin 8 isa distance piece (not shown) by means of which the pin 8 may be heldfirmly in position. The hole 11 is closed at the extreme end of the armor extension 10 by means of a cap 12 and the cylinder 6 is furtherprovided with a stuffing box 13 through which the arm 10 passes.

To operate the piston 7 and consequently the pin 8 forwardly andrearwardly by means of fluid pressure, fluid under pressure is admittedthrough supply pipe 14 to a valve chest 15 in which operates a valve 16provided with two spaced heads 17 and leading from the valve chest 15 toeither end of the cylinder 6 is a conduit 18. It will be either side ofthe ports 18 that fluid will be alternately supplied on either side ofthe piston? thus InOVing the piston and in 8 forwardly and rearwardly.Ports l9 eading from the valve chest 15 are provided to exhaust thefluid from either end of the cylinder 6. The lever for moving the valve16 and thus controlling the operation of the piston 7 will be describedlater.

- Mounted upon the opposite side of the body member 3 to that ofcylinder 6 is another cylinder 20 of smaller diameter. Within cylinder20 is a piston 21 to which is-attached a piston rod 22 extendingforwardly from the piston 21 through stuffing boX 23. The forwardportion of the piston rod 22 is formed into a rack 24 for a purposepresently to be described. In order to operate the piston 21 in cylinder2.0, fluid pressure is admitted through a conduit .25 into a valve chestin which operates a valve-26.

The operationof valve 26 to admit and eX- haust fluidpressure fromeither-end of cylinder 20 and to force the piston v2,1 forwardly andbackwardly is similar in every wayto the operation of valve 16controllingthe movements .of piston 7 which havealready been described:and further description .of valve 26 is thought to be unnecessary.

Extending forwardly from thebody member 3 is a'bracket member 27attached there to by means of .studs or bolts 28. This 7 bracket member27 is provided with a central bearing section "29 :in which rests thecentral portion of a cross shaft 30 provided with two screwthreadedportions .31 and 32, respectively, right and left threaded, and mountednear one .end 'of-the cross shaft 30 isa pinion .33 sliding .over a key34 fastened into the shaft 30. The pinion is provided with anextension35 within which is contained a compressive spring 36 held in place bymeans of a washer 37 and nut 38 on the end of shaft 30. Against theopposite side of pinion 33is located a collar- 39 fastened to the shaftin any, adjustable position by means of a screw 40. It will be seen fromthis construction that a slight amount of' movement of the pinion 33alongthe shaft 30 is permitted. Engaging the screw threaded portions 31.and 32 of the shaft 30 are the jaw members of a vise, respectively, 41and 42, which are moved toward or away from each other in accordancewith the rotation of the pinion '33 and shaft 30. As

' has been before described, the piston rod 22 controlling .themovements ofthe jaw members41 and 42 and the reciprocator-y pin 8, alever of special construction has been devised. This is best shown inFig. 7. The valves 16 and "26 are each provided with extensions 43 and44, respectively, and in these extensions 43 and 44grooves 45 and 51 arecut to cooperate with parts of the lever presently to be described. Thegroove 45 formed ineXtension 44 cooperates with the outer edge of a camplate 46 which is formed with a stud member upon one side 47 which isrotatably mounted in the frame of the body member 3. From thisconstruction it will be evident that as the cam plate 46 and stud member47 are rotated the valve 26 will be moved forwardly and backwardly dueto the obliquity of the cam 46, thus operating the piston 21 andconsequently forc irlig the jaw members 41 and .42toopen and c ose.

Pivotally mounted upon the cam plate and stud member 47 and in alinementwith the stud member 47 is a lever 48 terminating in a suitable handleportion 49. The lever 48 carries a projection 50 which fits into, thegroove '51 formed in.extension 43. As

shown in 7, the :lever'48 andcamplate 46 .are so oined that the levermayjmove in any direction as it isifree to pivot about tlonary. Toconfine the movements of lever 48 to those which will allow-but onevalve to beoperated at a time, a guide :53 is provided shownmostclearlyin Fig. '2. As shown in this figure the guide 53 comprises ayoke having an inverted T-shaped slot v54 adapted to fit'closely to thelever 48. -When the lever 48 is moved vertically within the verticalslot 55 of the T-shaped slot 54 the valve .26 is operated to move thepiston 21 to close the jaw'members 41 and 42 and when the lever 48 isoperated horizontally in thehorizontal slot-.56 the valve 16 is .op.er-

ated thus moving the pin 8 forwardly-and backwardly through themovements of the piston 7. To return the lever 48 to-the upper end ofthe slot 55,, ,a ,spning1'57 .isat

tached to the'lever 48, which holds the lever in its starting position.For vCon venience in holding the drill to be pinned out in position .adrill stop 58 is provided which is adjustable as shown in Fig. 2'bymeans of a rod 59 and setscrew 60.

'Whi'le the operation of my device maybe obviousfrom the above, a-shortdescription of the method of operation will be given. Starting with theparts as shown in the figures, the lever 48 is ffir'stim'oved downwardlythrough the vertical slot55 oflt-he guide 53 which has the efiect ofoperating the valve 26 to move it rearwardly to admit fluid underpressure to the cylinder 20 in rear of the piston 21, thus forcing itforwardly. The forward movement of the piston 21 has the effect offorcing the rack 24 forwardly, thus rotating the pinion gear 33 andforcing the jaw members 41 and 42 together tightly about a drill rod,either before or after it is sharpened, and inserted between the jawmembers 41 and 42 of the vise. The lever 48 is then operated forwardlyand rearwardly in the horizontal slot 56 of the guide 53 whichreciprocates the valve 16 and consequently the piston 7 and pin 8attached thereto. The movement of the pin 8 is with such force that itwill be forced into the central hole of a drill rod, thus clearing it ofany metal which has been forced into it during the sharpening orshanking operation. The thrusting of the pin 8 forwardly may be repeateda number of times or until the hole in the drill rod has been completelycleared. Upon returning the lever to the upper end of the slot 55 in theguide 53 both valves 16 and 26 are returned to their closed or centralposition, thus forcingthe piston 21 rearWardly and opening the jawmembers 41 and 42.

It is to be understood that while the present showing and descriptiondisclose only one specific embodiment of the present invention, otherforms and modifications are included within the spirit and scopethereof, as expressed in the appended claims.

What I claim is:

1. In 'a fluid operated pinning out device for rock drills, a visehaving jaw members, a piston operating the members of said vise,

an independent piston operating a pin,.a lever, and means whereby thelever may be moved first in one direction and then in another forcontrolling the movements of both pistons.

2. In a fluid operated pinning out device for rock drills, a vise havingjaw members, a piston operating the jaw members of said vise, anindependent piston operating a re ciprocatory pin and a lever mounted tomove first in one direction and then in another, a guide to limit themovements of the lever whereby the vise members may be closed about adrill rod, the pin then operated forwardly and rearwardly and then thevise members re-opened.

3. In a fluid operated vise for pinning out devices, a cylinder, apiston within said cylinder, a rack attached to and operated by saidpiston, vise jaw members mounted upon a shaft, rotation of said shaft 0crating said jaw members, and connections etween said rack and shaftwherebv movement of said piston will operate said jaw members.

4. In a fluid operated vise for pinning out devices, a cylinder, apiston within said cylinder, a rack attached to and operated by saidpiston, vise jaw members mounted to slide towardand away from eachother, a rotating shaft having left and right handed threaded portionsengaging said jaw members, and a gear mounted on said shaft and meshingwith said rack so that movement of said piston controls the movement ofsaid jaw members.

In testimony whereof, I have hereunto set no hand.

y JESSE DITSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

